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|Author(s):||Keith A. Gillis;|
|Title:||Second-order boundary corrections to the radial acoustic eigenvalues for a spherical cavity|
|Published:||August 17, 2012|
|Abstract:||We calculated the eigenvalues of the radially-symmetric acoustic modes of a gas-filled, spherical cavity to order (δT/a)2, where δT is the thickness of the thermal boundary layer and a is the radius of the cavity. Our results are consistent with high-precision acoustic measurements made to re-determine the Boltzmann constant.|
|Pages:||pp. L21 - L24|
|Keywords:||Boltzmann constant, spherical resonator, speed of sound, second order, radial modes, eigenvalues|
|Research Areas:||Metrology, International System (SI) of Units, Gas Metrology|
|PDF version:||Click here to retrieve PDF version of paper (299KB)|